ABSTRACT

Analysis of the graphs in this chapter indicates that in the dynamics of the levels of groundwaters, their discharge and loss influence so much the absolute values of levels and recharge at the boundaries as how much their patterns change with time. On the surface of the Earth exist conditions of the first to the third orders which characterise the entry or exit of water from the zone of aeration and relate the intensity of recharge with average precipitation for many years, evaporation and surface flow. The value of recharge is studied for the type schemes of structure of the zone of aeration based on the characteristics of climate, flow, regime of irrigation and annual precipitation. In the regional long-term prognosis, moisture transfer in the zone of aeration is considered and the equation is solved for H by averaging out the values of recharge and capacity spread over many years.